Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e234df799e7256…

MALICIOUS

PDF

52.7 KB Created: 2020-06-06 18:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c76e8b33bef418b6b6df2a7a35b044a6 SHA-1: e479fcb5ed770b519ec7b9ed3802312986a9dac2 SHA-256: 70e234df799e7256c4cdd442f3b5e5dc2654cb33a56d15afbaa42401d18f79d6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many of which are structured as a link farm, suggesting a malicious intent to redirect users. The document body, though partially obfuscated, contains a URL that appears to be a lure for downloading Minecraft maps, which is a common tactic for distributing malware. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://kcbevco.com/uploads/1/3/1/8/131871419/131871419.html#m%25C4%25B1necraft+hayran+haritalar%25C4%25B1+indir
    • http://island-park-community.sb.payhoa.com/uploads/1/3/1/4/131453045/ropudisagu-tazogi-golijizutavor.pdf
    • http://communicationssexton.us/uploads/1/3/0/8/130874094/sewuj.pdf
    • http://pablosofia.com/uploads/1/3/0/5/130550814/kafozobop_litetijodazoxad_medubuko.pdf
    • http://own-kc.org/uploads/1/3/2/3/132303146/04b8890.pdf
    • http://blackwolftshirts.com/uploads/1/3/0/8/130813921/ponomobikipalabexi.pdf
    • http://seattlespeaksgerman.com/uploads/1/3/0/5/130588790/3693656.pdf
    • http://keepinupwithkenz.com/uploads/1/3/1/8/131856068/7876050.pdf
    • http://jgersh.com/uploads/1/3/0/6/130621666/6488671.pdf
    • http://bravopolo.org/uploads/1/3/1/8/131857431/4279150.pdf
    • http://iezrareresources.com/uploads/1/3/1/4/131438157/vufogekifiwa.pdf
    • http://kcbevco.com/uploads/1/3/1/8/131871419/terms.html
    • http://kcbevco.com/uploads/1/3/1/8/131871419/dmca.html
    • http://kcbevco.com/uploads/1/3/1/8/131871419/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://luriwoge.files.wordpress.com/2020/06/wadavuxozurotojepomu.pdf
    • https://suwemolu.files.wordpress.com/2020/06/54091405172.pdf
    • https://mabowimijefu.files.wordpress.com/2020/06/4894655842.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009597.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
pdf-font-stream PDF embedded font (sfnt) at offset 0x9597 1800 bytes
font_01_sfnt_off00009e23.bin
acf6a9a621a551883d9d42f82f58d6c33d0494794ab88fe51751b6fe0e840a9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E23 12244 bytes